4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
More Changes Ahead for the Greenhouse Gas Reporting Rule
Posted: May 4th, 2010
U.S. EPA continues to work on the Mandatory Greenhouse Gas (GHG) Reporting Rule (MRR) that was codified at 40 CFR Part 98 on October 30, 2009 (74 FR 56260). So far this work has included proposed new source categories and […]
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Tightening the Screws – Lower NAAQS Mean Higher Costs
Posted: April 20th, 2010
ALL4’s Ambient Group continues to track and provide you with updates on the latest developments related to National Ambient Air Quality Standards (NAAQS). The NAAQS are the primary basis for the permitting of new stationary sources and modifications to stationary […]
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Back to the Future – Proposed Revocation of NSR Aggregation Amendments
Posted: April 15th, 2010
In response to a January 30, 2009 petition from the Natural Resources Defense Council (NRDC), U.S. EPA is soliciting comments regarding several aspects of the “New Source Review (NSR) Aggregation Amendments” that were promulgated on January 15, 2009. The NSR […]
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So Your Greenhouse Gas (GHG) Monitoring Plan is Complete… Now What?!?
Posted: April 11th, 2010
U.S. EPA’s Greenhouse Gas Mandatory Reporting Rule (GHG MRR) codified at 40 CFR Part 98 required that facilities subject to the rule have a complete written GHG Monitoring Plan by April 1, 2010. At a minimum, the GHG Monitoring Plan […]
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U.S. EPA Releases 1-Hour NO2 NAAQS Modeling Guidance
Posted: March 18th, 2010
The U.S. EPA Air Quality Modeling Group (AQMG) recently released a new guidance document for NO2 modeling. The document outlines procedures that can be used to calculate the NO2 design values for comparison to the new 1-hour NO2 National Ambient […]
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U.S. EPA Promulgates Final Air Toxics Standards for Compression Ignition RICE
Posted: March 12th, 2010
On March 3, 2010, U.S. EPA promulgated final National Emissions Standards for Hazardous Air Pollutants (NESHAP) for existing compression ignition (CI) stationary Reciprocating Internal Combustion Engines (RICE) that were not previously regulated by the existing, so called, RICE MACT (i.e., […]
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The Usual Suspects – U.S. EPA 2011 – 2013 Enforcement Initiatives
Posted: March 6th, 2010
The U.S. Environmental Protection Agency (U.S. EPA) has announced its 2011 through 2013 National Enforcement Initiatives to handle national environmental and public health problems. For air pollution, the initiatives include addressing air pollution from the usual suspects: the largest sources of […]
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New Nitrogen Dioxide Ambient Air Quality Standard Could Pose Challenges
Posted: February 26th, 2010
In the more than 200 air quality modeling analyses that ALL4 meteorologists have conducted, demonstrating compliance with the annual nitrogen dioxide (NO2) National Ambient Air Quality Standard (NAAQS) of 53 parts per billion (ppbv) has rarely been an issue. The […]
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Pennsylvania Proposes to Adopt Effluent Standards for New High TDS Wastewater Discharges
Posted: February 21st, 2010
The Pennsylvania Department of Environmental Protection (PADEP) is proposing to amend 25 Pa. Code Chapter 95 (relating to Wastewater Treatment Requirements) to establish new effluent standards for new sources of wastewaters containing high Total Dissolved Solids (TDS) concentrations. The Environmental […]
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Air Modeling Dispersion Program Update
Posted: February 14th, 2010
The Air and Waste Management Association (AWMA) held a conference entitled Guideline on Air Quality Models: Next Generation of Models in Raleigh, NC from October 28 – 30, 2009. During the conference representatives from U.S. EPA’s Air Quality Modeling Group […]
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